bacteria and decomposers
If you ment A living organism, then no it isn't. But I'm sure you ment in living organisms. Then yes, it is an important element found in most organisms and is used for a great range of functions. One example would be pH regulation in the blood, or any other liquid.
The air pressure would be greatest at the bottom of the valley because air is denser at lower altitudes due to the weight of the overlying air column.
At the bottom of an ocean energy pyramid, you would typically find phytoplankton or algae, which are the primary producers that convert sunlight into energy through photosynthesis. These organisms form the base of the marine food chain, providing energy to the rest of the ecosystem.
If there were no oxygen on Earth, most living organisms, including humans, would not be able to survive as oxygen is essential for respiration. Without oxygen, aerobic organisms would suffocate and eventually die. The atmosphere would likely become unbreathable, leading to widespread extinction of life.
You would expect to find talus at the base of a cliff or steep slope. Talus consists of loose, fragmented rock debris that has accumulated from the erosion of the cliff or slope above. It often forms a slope of angular rocks and boulders created by gravity pulling the rock fragments downhill.
Yes, more than at the surfase.
The living organisms that one would most likely expect to find in gardens are plants.
Few organisms are expected to live at the bottom of a deep lake due to reduced sunlight, colder temperatures, and lower oxygen levels. The conditions at the bottom of a deep lake are often harsh, limiting the availability of resources needed for organisms to thrive. As a result, the diversity and abundance of life is usually lower in this area compared to the surface or shallow regions of the lake.
Archaebacteria
Where would you expect to find most of the people of North Africa living
If ice sank in a lake, the water would freeze from the bottom up, potentially trapping organisms between the ice and the bottom of the lake. This would disrupt their habitat, reduce available oxygen, and could lead to a decrease in biodiversity as some organisms may not survive.
chloroplast
They are frogs and tadpoles.
Earth would be filled with dead organisms.
Increase
"In the lowest regions" is incorrect. 90% live in the top 200 meters in the highest of the 5 zones of the ocean, interacting with the sun in photosynthesis
Living organisms